diff --git a/HowtoHaproxy.md b/HowtoHaproxy.md
index 745705a6..edcbcee8 100644
--- a/HowtoHaproxy.md
+++ b/HowtoHaproxy.md
@@ -310,48 +310,26 @@ mysqlchk    8306/tcp            # mysqlchk
 
 On crée le script à exécuter dans `/root/mysqlchk` (droits: root:root 0750) :
 
-~~~{.bash}
-#!/bin/bash
-
-# Créer un utilisateur limité pour ces checks :
-# mysql> CREATE USER 'mysqlchk'@'localhost' IDENTIFIED BY 'PASSWORD';
-# mysql> GRANT SHOW DATABASES ON *.* TO 'mysqlchk'@'localhost';
-
-MYSQL_HOST="127.0.0.1"
-MYSQL_PORT="3306"
-MYSQL_USERNAME="mysqlchk"
-MYSQL_PASSWORD="PASSWORD"
-TMP_FILE="/tmp/mysqlchk.out"
-ERR_FILE="/tmp/mysqlchk.err"
-
-/usr/bin/mysql --host=$MYSQL_HOST --port=$MYSQL_PORT --user=$MYSQL_USERNAME \
-        --password=$MYSQL_PASSWORD -e"show databases;" > $TMP_FILE 2> $ERR_FILE
-
-uptime=`cat /proc/uptime | cut -f 1 -d .`
-
-if [ "$(/bin/cat $TMP_FILE)" != "" ] && ( /root/nrpe-check-mysql-slave.sh >/dev/null || [ $uptime -gt 3600 ] ); then
-        # mysql is fine, return http 200
-        /bin/echo -e "HTTP/1.1 200 OK\r\n"
-        /bin/echo -e "Content-Type: Content-Type: text/plain\r\n"
-        /bin/echo -e "\r\n"
-        /bin/echo -e "MySQL is running.\r\n"
-        /bin/echo -e "\r\n"
-else
-        # mysql is fine, return http 503
-        /bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
-        /bin/echo -e "Content-Type: Content-Type: text/plain\r\n"
-        /bin/echo -e "\r\n"
-        /bin/echo -e "MySQL is *down*.\r\n"
-        /bin/echo -e "\r\n"
-fi
-~~~
-
-Puis le script de check mysql lui-même, par exemple `/root/nrpe-check-mysql-slave.sh` (droits: root:root 0750) :
-
 ~~~{.bash}
 #!/bin/sh
 
-exec /usr/lib/nagios/plugins/check_mysql -f /etc/mysql/debian.cnf --check-slave -w 5 -c 60
+# Mysql is down, return a 503
+return="503 Service Unavailable"
+
+# Mysql is fine, return a 200
+/usr/lib/nagios/plugins/check_mysql -f /etc/mysql/debian.cnf >/dev/null && return="200 OK"
+
+# Mysql is up but replication is not ok, return a 404
+# You may want to comment this line in master/master mode
+# It disable server (NOLB status) when replication is down or lagging
+/usr/lib/nagios/plugins/check_mysql -f /etc/mysql/debian.cnf --check-slave -c 60 >/dev/null || return="404 OK"
+
+cat <<EOF
+HTTP/1.0 ${return}
+Content-Type: Content-Type: text/plain
+Content-Length: 0
+
+EOF
 ~~~
 
 On redémarre xinetd (surveiller `/var/log/syslog` pour d'éventuelles erreurs) et on pense à autoriser le port 8306 au niveau firewall depuis les IP concernées.